Gauge



Aug2819232 1,466.35@ M. E. FIELD GAUGE ,Filed May 2, 1921 l paratus for ascertaining of either or both liquids in Y Figs. la. lb. and lo Patented Aug. as', icas.

narran srara s PATENT* orrlcs.

MICHAEL BIRT FIELD, OF GLASGOVJ, SCOTLAND, ASSIGNOR TO INEUIll/IERCA'JJORv COMPANY, OF NEW 'YORK7 N. Y., A CORPORATION OF MAINE. Y

GAUGE.

KK, Application filed May 2,

i5 siding at Glasgow, Scotland, have invented a certain new4 and useful Improvement in Gauges,lof which the following is a specification.

This invention relates to an improved api Y at a distant station the position of the plane of demarcation between two immiscible liquids ina tank or otherA vessel filled with such liquids, or for ascertaining the weight, height or volume the tank or other vessel, or the total weight of the liquid contents of such tankor vessel. n In the accompanying drawings Figl represents diagrammatically an adaptation of the invention for ascertaining the position of the plane of demarcation of fuel'oil and sea water contained in a compensated fuel tank in a submarineor ship, the tank having a connection vto the sea for admission of sea water to take the place of Ifuel oil as the latter is expended. For the purpose of the diagram it isassumed that the oil is lighter than sea water and that it occupies 'accordingly the upper'portion of the tank.

are detail views repre'- senting in differentpositions Vvalves between two gauge glasses and a closed chamber hereinafter referred to. Y

Fig, 2 represents diagrammatically an installation suitable for a number of similar tanks with one indicating instrument. Fig. 3 represents diagrammatically'an installation suitable for a number of dissimi- Y lar tanks with 'one indicating instrument per tank.

f The same reference'characters denote similar parts inthe several views.

rIhe apparatus shown in Fig. l comprises two gauge glassesl. 2 or the like'located'at the observation station, the lower end ofthe glass being connected to a pipe 3 in communication with the sea water outsidethe submarine` and the lower .end ofthe other glass 2 :being connected to a pipe 4 which terminates inside the tank 5 containing the immisoible liquids, y.inV the instance' shown near to the top of theta-nk 5,'the two pipes 3, 4 being as far as possible laid closely alongside one another so as to besubject to the same temperaturel conditions', (It fis not 1921, serial No. 466,053.

point ou side the vessel'and below the water line, it

being important always that the pipes 3 and 4 be as nearly as possible at the same temperature.) By means of suitable valves or cocks C1, C2, the upper ends of the gauge glasses l, v2 with each other, or may be togetherin communication with Va Vclosed chamber 6 fitted with a pet cock or va-lvej7 for venting to the surrounding atmosphere andv connected with an air pressure supply line 8 under the control of a valve 9. By adjustment ofthe valves C1, C2, sea water may be vadmitted to the chamber 6, and then by the action of air under pressure driven through the^pipe 4 leading to the tank 5 until sea water, sea water thus introduced into the tank 5 at or near the top descending to thebottom of the tank and displacing the the pipe 4 is entirely full of` may be put in communication put singly or both same amount of seawaterl from the bottom of the tank 5, the displaced water p assing'to the sea by way of `the pipe P. 'Then the two gauge glasses 1,2 Vare'put in communiequal in height to the height of theupper end of the pipe'4 above the bottom of the tank r5 and of a corresponding column of sea water and oil as it exists in the tank 5. In conjunction with theV gauge glasses 1, 2 there is orvmaylbev employeda shiftable scale l0 the zero mark s ofv thetwo levels, so that the diii'erence can' be read directly oii" the scale. s be kmarked toindicate not onlythe position of the plane (ii-'demarcation in the tank, but also the weight or volume of the oil or lwater in the tank, or'the weight of thetotal liquid contents of the tank. Y j With' provision` of. suitable connections gauge glasses, be made to serve a number jof tanks or ves# sels as will beunderstood yfrom'reference to Figs. 2 and 3 .without further explanation, a, 'gauge aeeeraing' mj the invention is y one another with a suitableV quantity of air trapped in the of which can be set toA one The scale may @i equallyserviceable vwhen the liquid fuely o r other'A liquid required tobe draivn off is the loiver heavier than. Water and occupies portion of the tank; i

ln the latter 'alternative the :fuel-'draw off pipe is of course placed near the bottone of the tank.

From the foregoing it will be seen that have provided an apparatus including tubes connected to a gauge atleast one of which tubes communicates with the interiorof the 'lli or` vessel, said apparatus being ariiai'ige'd to irieas'ure the difference/iii pressure liead'yof a "coluinn of 'given height of one liquid' anda coluinnoi equal height cornpos'ed the tivo liquids as they exist withi'ii theltfaiik or vesse I lelaiin, l p

l. `ln,c."or'i'ibii'fiation, a tank containing" irncible liquids dof dilerent speciiic gravities and open to a volume of one of said liquids exterior to said tank, la gauge, and tubesbOiineCted t said gauge, one oi said tu esfeonikunica'tiii'g 'i'vitli the vinterior of said taiik and' another f said tubes being in /eonnectio'ii ivitli the liquid' exterioijto' said tak, 'whereby 'said 'gauge' is enabled to inea'sure the, diferenee in pressureliead aeolurnn of given heiglitofthe liquid exterior' tos ftank and of a oolunin of equal height eftjhe me liquide as they exist withinlfsaid' tank? Y Y I i `iieoi'Y ibinationl: aftank containing' iniiiiscibleliquids oi different specifie gravi ties and' openrtoa volume of oiiero said liquids exterior to saidv tank, tivoz gauge liasses, tubes i connected to said gauge asses",` one of said Itubes coiniriunieating ivi h theiiiterior of saidtank andL the .other t being in e'oiinefctionwith theliqiiid e" ,Y K :chambery a pressure iiiediuni supply fconnection to said Viha'ifiibei',. connections betiveeri said gauge glasses and said, lChamber whereby 'l s 'ses in'ay` beI putin c oini'nuii'i erioi to said tank, a 'closed c"onyiintlyi in communication, vlfith said eliaBuber.y.` i A. Y- y 3; rr'i combination with atank containing' tiv i Lir'iisicibleq liquids of diderent specific gavli ies, and ,having outletdor one of 'the liquid iid auinlet for the other liquid, siih in et enig? Qpen to aneftezi'nal body of n i liquid under pressure, whereby pressure is nii osea .en the tank Contents, e pipe liiie containing`- apressure-transmitting fluid terininatiiig* in the upper :part or the tk; another said-centerline pipe use er- Vtangled to tra-ns'n'iit the pressure imposed by saidv egrternal body of liquid, and pressure i'ating' meaiis connected ,with said pipe lines arfranged toY correlate the pressures reissue .bi een j l qll.. vliteoiiibiriation With-.a tank containing' tivo Vifiiiiiiseilo'le'lliquids of different speeiiic .the iiqifis ena en niiet` Y said pipe of the tank eoiitents, and the ot tliertaiik, and a gauge connected to said pipe v and thereby caused to give pressure indications corresponding to the difference between; thepressure head oi' a coluiiin of said liquid and that oi' acoluinn of equal height of tlieltiiio liquids as tliey'enist inthe tank.

5. conibiiiation with va tankl containing tivo iinniis'cible Yliquids oi ydiiererit specifie Vgravities.,*and* hai/'ing an .outlet for one Voi such inlet being open to an external body of such other liquid under pressure, yvlierebyl pressure is imposed on the tank contents, a pipe ycontaining one said liquids open at its end to the tank` contents iiear one if the eXtreme levels of tlietank, a gauge connected to said pipeV aiidqtliere'by' eaused to 'give pressure indications .corresponding tothey diuer'ence between the pressure head of a column, olf one of the liquids, equal iii height to ltl'ie yer'tieal distance troni said 'pipe end to Ythe opposite extremityY of the tank and the pressure head of a eoluinn of equal height oi the tivo liquids as they eX- ist in the tank, and a second gauge arranged to shoiv the pressure imposed by the eX- t'ern'al liquid, unaffected by tente.. f

gravities, andhaving an outlet for one of theV tank loonl for the other` liquid,

6. In combination with ,a .tank containing l' tifo i'rniniseible' liquids oi d'iiierentspecilic gravitiesg.v and Ilf'iaviugr anv outlet Yfor one o the1liquids and an. inlet 'for thefotlierqliquid, such inlet being open to an -ei'rteri-ial body of4 suoli ozher' l' quid under pressure', ivheieV by pressure is imposed onL the Vtank contents,

a differential pressure Yindiratingv apparatus,y ai'id tivo pipe lines leadingOIF respectively from opposite parts of said af'i'paratus Yand conf taining;L a pressure transmitting; fluid, one of lines extending toa partqofthe tank u'he'r it ieeives they internal of the tank, niodiiied by the pressure teri'niri'ati at a po nt, in connect-ion with tifk ruil pressuretiereef. e,

v7.vr Tlji combination Yy'v'itlfifa. tank adapted t6 vbe lilled with finirnisc'ble liquidspof rela-v tiv. l Y i i i i pressure head. ier pipe line .the external body of liquidvivhere it receives n different specific:l gratuities and4 havf Ving au eXter'nal *connection near oneV otfits d Yvertical extremitiesv With an rexternal bqdy iso sure receiving communication with said external body or liquid, and differentialV pressure indicating means coupled with said tubes to indicate the difference between the pressures in the fluids contained within said tubes.

8. ln combination, a tank containing immiscible liquids of dill'erent specific gravities and being open to a Volume or" the heavier of said liquids under pressure exterior to the tank, a gauge, and tubes connected to said gauge, one of said tubes communicating with the lighter' ont the liquids inside the tank and another ot' said tubes being in communication at a corresponding level with the liquid exterior to the tank, said gauge bein;Y adapted to indicate the ditference between the 1iressures transmitted through said tubes from the liquid with which the tubes are res ectively in communication.

9. ln combination, a tank adapted to contain immiscible liquids ot dii'lierent speciic gra-vities and being in communication at its lower part with an external body of the heavier ot' said liquids under pressure, a tube containing a pressure transmitting medium opening into the upper. part of the tank, a second tube containing a pressure transmitting medium in connection with the external body of liquid, and means for indicating the difference between the pressures existing in the two tubes, said indicating means thus being adapted to measure the lluctuations in height of the demarcation plane between the liquids in the tank.

l0. In combination with a tank containing immiscible liquids orn different specific gravities and being in communication near one of its vertical extremities with an external body oi one ot said liquids under pressure. means for indicating at a distance the height of the demarcation plane between said liquids comprising` two tubes each. containing a'pressure transmitting' iluid and one ot them being in communication with one ot the liquids in the tank and with the liquid external to the tank, the relative heights of such communications being the other Vbetween such transmitted pressures.

ll. In combination, a tank containing immiscible liquids of different specific gravities and the heavier of said liquids being in communication with a volume of the same liquid under pressure external to thev tank,

Vtwo gauge glasses, two tubes connected to said gauge glasses, one of said tubes communicating with the lighter ofv the'liquids` inside oi the tank and the other being in connection at a corresponding level with the liquid exterior to the tank, a closed chamber, a. pressure Amedium supply connection to said chamber, and connections between said gauge glasses and said chamber. whereby said gauge .Olasses may be put in communication with each other and individually and conjointlv in communication with .said chamber.

l2. In a ship, a tank adapted to contain loil and having a sea connection through which the water external to the ship may enter to exert pressure on' the oil and supplant displaced oil, a differential pressure indicator and tubes so connected with said indicator as to cause indication by the latter of the difference between the pressures eX- isting in the tubes, one oi said tubes being in pressure receiving communication with the body ot oil in the tank and the other being in similar communication with the external water.

In testimony whereof I have signed name to this specification in the presence of two subscribing witnesses Y I MICHAEL BIRT FELD.

Witnesses: i

IsABEL ROLLO, Y p KATE FOTHERINGHAM. K 

